Last Known Eruption
1d 15h 31m ago

Latest Eruptions

Eruption DurationCodeInterval
16 Aug 2018 @ 093710m 42s D5V6/G21C2h 47m
16 Aug 2018 @ 065011m 42s D6/G21C53d 19h 46m
23 Jun 2018 @ 1103:568m 29s T2*C67d 2h 21m
17 Apr 2018 @ 0842 ? wc11m 42s D5V6/G21C6d 20h 50m
10 Apr 2018 @ 1152 ? wc12m 42s ---7h 32m
10 Apr 2018 @ 0420 ? ns wc11m 11s D5V6/G21Q3d 22h 6m
06 Apr 2018 @ 0614 wc---3d 17h 26m
02 Apr 2018 @ 1248 ? wcD20/-2Q7d 3h 25m
26 Mar 2018 @ 0923 wc---6h 6m
26 Mar 2018 @ 0317 wc---5h 47m
25 Mar 2018 @ 2130 wc---6h 12m
25 Mar 2018 @ 1518 wc-1-5h 42m
25 Mar 2018 @ 0936 ie wc---6h 2m
25 Mar 2018 @ 0334 wc-1-5h 35m
24 Mar 2018 @ 2159 wc-2-6h 30m
24 Mar 2018 @ 1529 wc-2-6h 13m
24 Mar 2018 @ 0916 wc---6h 8m
24 Mar 2018 @ 0308 wc-1-5h 59m
23 Mar 2018 @ 2109 wc-1-6h 10m
23 Mar 2018 @ 1459 wc-1-6h 33m
23 Mar 2018 @ 0826 wc---11h 54m
22 Mar 2018 @ 2032 wc-2-6h 2m
22 Mar 2018 @ 1430 wc-2-6h 31m
22 Mar 2018 @ 0759 wc---5h 59m
22 Mar 2018 @ 0200 wc---6h 17m
21 Mar 2018 @ 1943 wc-1-6h 40m
21 Mar 2018 @ 1303 wc-1-5h 55m
21 Mar 2018 @ 0708 wc---5h 44m
21 Mar 2018 @ 0124 wc---6h 14m
20 Mar 2018 @ 1910 wc-2-6h 16m
20 Mar 2018 @ 1254 wc-2-6h 18m
20 Mar 2018 @ 0636 wc---6h 18m
20 Mar 2018 @ 0018 wc-1-6h 10m
19 Mar 2018 @ 1808 wc---5h 53m
19 Mar 2018 @ 1215 ie wc-1-5h 56m
19 Mar 2018 @ 0619 wc-2-6h 44m
18 Mar 2018 @ 2335 wc-2-6h 11m
18 Mar 2018 @ 1724 wc-1-5h 53m
18 Mar 2018 @ 1131 wc-1-6h 22m
18 Mar 2018 @ 0509 wc---5h 48m
17 Mar 2018 @ 2321 wc---5h 42m
17 Mar 2018 @ 1739 wc---6h 2m
17 Mar 2018 @ 1137 ie wc---11h 39m
16 Mar 2018 @ 2358 wc---6h 0m
16 Mar 2018 @ 1758 ini maj10.5m --Q6h 23m
16 Mar 2018 @ 1135 wc-2-6h 11m
16 Mar 2018 @ 0524 wc---5h 56m
15 Mar 2018 @ 2328 wc---6h 16m
15 Mar 2018 @ 1712 wc-2-6h 7m
15 Mar 2018 @ 1105 wc-1-5h 54m
15 Mar 2018 @ 0511 wc-2-5h 57m
14 Mar 2018 @ 2314 wc---5h 58m
14 Mar 2018 @ 1716 wc---6h 5m
14 Mar 2018 @ 1111 wc-1-5h 48m
14 Mar 2018 @ 0523 wc-2-5h 39m
13 Mar 2018 @ 2344 wc---6h 14m
13 Mar 2018 @ 1730 wc-2-6h 0m
13 Mar 2018 @ 1130 wc-2-6h 14m
13 Mar 2018 @ 0516 wc---5h 56m
12 Mar 2018 @ 2320 wc---6h 7m
12 Mar 2018 @ 1713 wc-1-6h 37m
12 Mar 2018 @ 1036 wc10m -2-6h 9m
12 Mar 2018 @ 0427 wc---6h 1m
11 Mar 2018 @ 2226 E---6h 15m
11 Mar 2018 @ 1611 wc-1-7h 2m
11 Mar 2018 @ 0909 wc-2-6h 15m
11 Mar 2018 @ 0154 wc---6h 14m
10 Mar 2018 @ 1940 wc-1-5h 59m
10 Mar 2018 @ 1341 wc-2-6h 45m
10 Mar 2018 @ 0656 wc---6h 21m
10 Mar 2018 @ 0035 wc---6h 34m
09 Mar 2018 @ 1801 ie wc---8h 4m
09 Mar 2018 @ 0957 wc-2-5h 52m
09 Mar 2018 @ 0405 wc-1-6h 6m
08 Mar 2018 @ 2159 wc-1-6h 22m
08 Mar 2018 @ 1537 wc---5h 58m
08 Mar 2018 @ 0939 wc-1-6h 3m
08 Mar 2018 @ 0336 wc---5h 49m
07 Mar 2018 @ 2147 wc-2-6h 6m
07 Mar 2018 @ 1541 wc-1-6h 29m
07 Mar 2018 @ 0912 wc---6h 11m
07 Mar 2018 @ 0301 wc---6h 40m
06 Mar 2018 @ 2021 wc---6h 0m
06 Mar 2018 @ 1421 wc-2-7h 9m
06 Mar 2018 @ 0712 wc-2-6h 24m
06 Mar 2018 @ 0048 wc---6h 18m
05 Mar 2018 @ 1830 ie wc---6h 9m
05 Mar 2018 @ 1221 wc-1-6h 20m
05 Mar 2018 @ 0601 wc-2-6h 3m
04 Mar 2018 @ 2358 wc---6h 22m
04 Mar 2018 @ 1736 wc-2-6h 6m
04 Mar 2018 @ 1130 E---5h 57m
04 Mar 2018 @ 0533 E---6h 6m
03 Mar 2018 @ 2327 E---5h 46m
03 Mar 2018 @ 1741 wc-2-6h 31m
03 Mar 2018 @ 1110 wc---6h 22m
03 Mar 2018 @ 0448 wc---5h 47m
02 Mar 2018 @ 2301 wc---13h 11m
02 Mar 2018 @ 0950 E---6h 44m
02 Mar 2018 @ 0306 wc---6h 4m

Interval Statistics

Interval Count100
Min2h 47m
Max67d 2h 21m
Mean1d 16h 11m
Median6h 10m
Grand-Specific
Start4G/1T (80% G)
Max Bursts2
Mean Bursts1.6
Median Bursts2
End4C/3Q (57.14% C)

Latest Notes

Note IDStart Time (US/Mountain)End Time (US/Mountain)EntrantNote
7834 21 Nov 2017 @ 0733 --- MikeG "Groblong" cloud downbasin at 7:33ie wc.
7715 16 Oct 2017 @ 0003 --- JoeN looked like Grand at 0003, lasted about 10 minutes, condition very dark, hard to be sure. Right place slightly early.
7712 15 Oct 2017 @ 1827 --- ljmercier Grand had a second burst!
7533 29 Sep 2017 @ 0747 --- JimS Pool empty, Vent and Turban quiet.
6245 09 Sep 2017 @ 1933 --- sfavor waves on grand
5570 02 Sep 2017 @ 0630 --- JimS Empty. Turban and Vent quiet.
5317 25 Aug 2017 @ 0626 --- JimS Pool empt, Vent and Turban ie.
5297 24 Aug 2017 @ 0604 --- JimS Pool empty. Vent and Turban quiet.
5296 23 Aug 2017 @ 2352 --- Jake Vent and Turban ie, Grand empty
4943 18 Aug 2017 @ 0907 --- Brian Overflow started at 9:07
4888 14 Aug 2017 @ 0655 --- JimS Pool below overflow.
4869 10 Aug 2017 @ 0619 --- JimS No water in the pool yet.
4541 26 Jul 2017 @ 0610 --- EmilyW Pool empty, vent turban quiet, no water visible in pool
4529 25 Jul 2017 @ 0523 --- SteveO Grand'a pool is empty and Vent & Turban are going.
4521 24 Jul 2017 @ 0638 --- JimS Small amount of water in the pool. Probably erupted around 0415.
4516 23 Jul 2017 @ 0656 --- JimS First overflow from the pool at this time.
4502 19 Jul 2017 @ 1500 --- SteveO VC in now predicting Grand 6.5 hours + or - 90 minutes
4480 18 Jul 2017 @ 0536 --- SteveO Grand's pool empty, Vent & Turban quiet.
4429 09 Jul 2017 @ 0757 --- Barbara Lasseter first burst ended at 0806. 2nd burst at 0807 lasted under one minute. G2 C
4317 15 Jun 2017 @ 0634 --- B**2 Definitely post-eruption. Turban & Vent sill going.
4280 09 Jun 2017 @ 0701 --- JimS Start of overflow from pool.
4279 09 Jun 2017 @ 0624 --- JimS Plenty of water in the pool. Probably erupted about 0300.
4199 04 Jun 2017 @ 0601 --- JimS Pool empty. Vent and Turban quiet.
4135 27 May 2017 @ 0448 --- Betty probably ie, but very foggy downbasin, and streaming is very choppy, so I don´t dare to call it an eruption
4117 23 May 2017 @ 0521 --- SteveO Grand's pool empty, vent & Turban ie
4110 21 May 2017 @ 0618 --- JimS Pool empty and Vent and Turban ie.
4081 11 May 2017 @ 0710 --- JimS Start of overflow from pool at 0710.
4080 10 May 2017 @ 0632 --- JimS First water came into the pool.
4079 10 May 2017 @ 0601 --- JimS Pool empty. Vent and Turban quiet at 0601.
4072 08 May 2017 @ 0635 --- JimS First water came into the pool. Usually occurs 2hrs to 2hrs 10min after the eruption starts.
4071 08 May 2017 @ 0607 --- JimS Pool empty. Vent and Turban quiet.
3965 09 Apr 2017 @ 0726 --- vw Possible Grand eruption, ie. Too foggy to be sure. A video review may clarify.
3957 27 Feb 2017 @ 0740 --- vw Large steam plume. Timing for Grand eruption consistent. Unable to to see water due to steam/fog. Video review may confirm eruption.
3955 20 Feb 2017 @ 0831 --- WillBoekel has not reached overflow yet
3954 19 Feb 2017 @ 1030 --- WillBoekel entered overflow in the last hour
3947 15 Feb 2017 @ 0758 --- vw Very large steam plume in Grand area. Unable to verify as Grand due to ground fog, but size and duration suggest Grand eruption.
3945 10 Feb 2017 @ 0622 --- novakg Possible Grand eruption. Very difficult to tell on webcam.
3935 29 Jan 2017 @ 0721 --- Graham Empty. Turban and Vent ie
3933 28 Jan 2017 @ 0737 --- Graham Empty gurgling and steaming
3932 27 Jan 2017 @ 0740 --- Graham Empty and quiet
3917 23 Jan 2017 @ 0720 --- Graham Post eruptive
3916 23 Jan 2017 @ 0656 --- vw Very large steam plum when I opened window. Too dark and steamy to see clearly. Video review would be helpful.
3901 24 Dec 2016 @ 1747 --- Betty Steam cloud in Grand area, so it possibly went. Hard to tell in the dim light and vanishing visibility.
3877 23 Nov 2016 @ 0820 --- vw Very large steam plume, but I was unable to see water during approx. 10m of heavy steam. Too uncertain to log as an eruption. Review of video may reveal better determination.
3862 06 Nov 2016 @ 0824 --- WillBoekel pool pretty full but not in overflow.
3861 06 Nov 2016 @ 0625 --- Graham Big steam cloud from Grand or Oblong. Not sure which.
3800 23 Oct 2016 @ 1301 --- Janet White Water in Grand but still a ways to overflow
3774 10 Oct 2016 @ 0939 --- ACarlson Sorry. No E time. Logger is not working.
3764 09 Oct 2016 @ 0756 --- SteveO Grand is empty
3732 01 Oct 2016 @ 0805 --- bhoppe Pool was in overflow, but was quite low during Turban eruption.
3717 26 Sep 2016 @ 0722 --- Kitt B Grand 0722 ie? hearing it from Beehive overlook
3714 25 Sep 2016 @ 0551 --- Betty Steam cloud in the right area, but it is too dark to be sure
3690 20 Sep 2016 @ 0755 --- JimS First water came into the pool.
3687 19 Sep 2016 @ 0640 --- JimS Pool in overflow.
3682 17 Sep 2016 @ 2242 --- ARoe Left Grand. Had not erupted yet.
3675 16 Sep 2016 @ 1505 --- Devin C. At 1500 the pool was full and waving. At 1502 Grand started splashing and doming about four times to 1-4 feet tall. It then died. Pool dropped and turban was at 1507.
3659 14 Sep 2016 @ 0727 --- JimS Pool in overflow at 727 when I returned from beehive.
3658 14 Sep 2016 @ 0659 --- JimS Almost in overflow at 0659.
3650 12 Sep 2016 @ 0701 --- JimS Already in overflow at 0701.
3644 11 Sep 2016 @ 0826 --- JimS Overflow started at 0826.
3643 11 Sep 2016 @ 0714 --- JimS Below overflow at 0714.
3613 07 Sep 2016 @ 0629 --- JimS Already in overflow when I arrived at 0629.
3607 06 Sep 2016 @ 0636 --- JimS Already in overflow when I arrived at 0636.
3602 05 Sep 2016 @ 0640 --- JimS Pool was already in overflow when I arrived at 0640.
3598 04 Sep 2016 @ 0628 --- JimS Pool empty. Turban and Vent quiet at 0628.
3594 02 Sep 2016 @ 0046 --- DGInc Might've erupted. Visible steam for about 10 to 11 minutes.
3584 01 Sep 2016 @ 0530 01 Sep 2016 @ 0630 JimS Pool empty and Vent and Turban quiet at 0530. First water at 0630.
3588 01 Sep 2016 @ 0435 --- DGInc Might've erupted
3585 31 Aug 2016 @ 2203 --- DGInc Might've erupted. 2204 is also possible.
3577 31 Aug 2016 @ 0528 --- JimS In overflow at 0528.
3574 30 Aug 2016 @ 0538 --- JimS Pool in overflow.
3569 29 Aug 2016 @ 0615 --- JimS Empty. Turban ie but no Vent.
3571 29 Aug 2016 @ 0411 --- DGInc Might've erupted. Duration was approximately 10 minutes
3527 22 Aug 2016 @ 1034 --- udo 11 minutes into Turban cycle Grand started full pool having waves.
3509 19 Aug 2016 @ 0626 --- JimS The pool at 0626 looks right for an eruption at about 0326.
3507 19 Aug 2016 @ 0326 --- Betty mentioned Grand ie at 0326
3451 09 Aug 2016 @ 0535 --- JimS Pool empty. Vent and Turban quiet.
3404 02 Aug 2016 @ 0452 --- DGInc Might've been in eruption.
3334 21 Jul 2016 @ 0610 --- JimS Overflow started 0610.
3311 18 Jul 2016 @ 0538 --- JimS Overflow from pool started at 0538.
3288 11 Jul 2016 @ 0551 --- JimS Pool in overflow at 0551. Possibly start of overflow.
3289 11 Jul 2016 @ 0043 --- DGInc MAY have erupted. Oblong is also a possibility. Due to the blurriness of the webcam it isn't visible as good as I would've liked, but it looked like 9 to 10 minutes. Maybe an E-time wouldn't be that bad to have though...
3287 11 Jul 2016 @ 0010 --- EmilyW Left at 0010. No eruption yet, left on good pool that did not produce eruption. Great overflow at early at 12 minute mark, dropped at 16 minute mark. Ridges when turban erupted. Previous two fills were poor.
3281 10 Jul 2016 @ 0542 --- JimS Pool in overflow.
3283 10 Jul 2016 @ 0012 --- DGInc May have erupted. Duration was about 10 minutes
3267 09 Jul 2016 @ 0520 --- JimS Pool already in overflow at 0520.
3269 09 Jul 2016 @ 0036 --- DGInc May have erupted. Duration was about 10 minutes, even though it is really hard to see (fancy 360p video quality)
3254 08 Jul 2016 @ 0538 --- JimS Overflow from the pool started 0538.
3256 08 Jul 2016 @ 0056 --- DGInc May have erupted. Last visible steam was about 10 to 11 minutes after noticing it.
3234 07 Jul 2016 @ 0514 --- JimS Pool empty. Vent and Turban quiet.
3222 06 Jul 2016 @ 0111 --- DGInc Might have erupted at that time. Due to the blurriness it is almost unseeable. Duration was about 10 to 11 minutes.
3209 05 Jul 2016 @ 0524 --- JimS Pool empty. Vent and Turban quiet.
3187 03 Jul 2016 @ 0500 --- Graham In overflow.
3163 01 Jul 2016 @ 0530 --- JimS Pool in overflow at 0530.
3135 26 Jun 2016 @ 0247 --- DaveM Appeared to be post eruptive at 0247 when web camera restarted
3133 25 Jun 2016 @ 0601 --- JimS Start of overflow.
3132 25 Jun 2016 @ 0521 --- JimS Pool below overflow.
3130 24 Jun 2016 @ 0214 24 Jun 2016 @ 0246 DGInc May have erupted during the nightly reset of the webcam. Some steam was visible in that area (maybe Turban and Vent continued until 0323?) and I haven't seen a Grand before or after the interuption.
3083 17 Jun 2016 @ 0511 --- JimS Pool in overflow at 0511.
3077 16 Jun 2016 @ 0533 --- JimS Pool in overflow, Turban ie at 0533.
EntrySourceLinkComment
31 Jul 2017 @ 1608 JSJ https://www.youtube.com/watch?v=PVKlUye_S8A Time lapse video of Grand Geyser's afternoon eruption on 31 July 2017.
31 Jul 2017 @ 1608 JSJ https://www.flickr.com/photos/jsjgeology/35790098193 Photo (out of 6) of Grand Geyser's 4:08 to 4:20 PM eruption on 31 July 2017.
08 Jun 2016 @ 1409 JSJ https://www.flickr.com/photos/jsjgeology/31182392056 Thermal image (1 of 8) of Grand Geyser's 2:09 to 2:20 PM eruption on 8 June 2016.
08 Jun 2016 @ 1409 JSJ https://www.flickr.com/photos/jsjgeology/31182537916 Photo (1 of 12) of Grand Geyser's 2:09 to 2:20 PM eruption on 8 June 2016.
11 Aug 2016 @ 1454 JSJ https://www.flickr.com/photos/jsjgeology/29895281572 Photo (1 of 12) of Grand Geyser's 2:54 to 3:06 PM eruption on 11 August 2016.
15 Aug 2015 @ 1057 JSJ https://www.youtube.com/watch?v=5oFebRTTHA4#t=13m58s Clips 27-31 of this video compilation (time stamp 13:58 to the end) show Grand Geyser's 10:57 to 11:09 AM eruption on 15 August 2015.
07 Aug 2015 @ 1945 JSJ https://www.youtube.com/watch?v=5oFebRTTHA4#t=12m00s Clips 20-26 of this video compilation (time stamp 12:00 to 13:58) show Grand Geyser's 7:45 to 7:56 PM eruption on 7 August 2015.
06 Jul 2015 @ 1435 JSJ https://www.youtube.com/watch?v=5oFebRTTHA4#t=11m27s Clips 17-19 of this video compilation (time stamp 11:27 to 12:00) show Grand Geyser's 2:35 to 2:46 PM eruption on 6 July 2015.
20 May 2015 @ 1927 JSJ https://www.youtube.com/watch?v=5oFebRTTHA4#t=5m26s Clips 13-16 of this video compilation (time stamp 5:25 to 11:27) show Grand Geyser's 7:27 to 7:40 PM eruption on 20 May 2015.
18 May 2015 @ 1639 JSJ https://www.youtube.com/watch?v=5oFebRTTHA4 Clips 1-8 of this video compilation (time stamp 0:00 to 4:17) show Grand Geyser's 4:39 to 4:49 PM eruption on 18 May 2015.
04 Sep 2002 @ 1213 JSJ https://www.youtube.com/watch?v=oW-EWQ60ZwI Video of Grand Geyser's 12:10 PM eruption on 4 September 2002 - 3 bursts + afterburst.
28 Aug 2013 @ 1731 JSJ https://www.youtube.com/watch?v=Myae9uC9qp8 Video by Micah Kipple of the 2nd burst of Grand Geyser's late afternoon eruption on 28 August 2013.
28 Aug 2013 @ 1731 JSJ https://www.youtube.com/watch?v=mtjkvtfaPN8 Video by Micah Kipple of the initiation of Grand Geyser's 5:30 PM eruption on 28 August 2013.
05 Jul 2013 @ 0849 JSJ https://www.youtube.com/watch?v=kYDQyexnLfI Video by Micah Kipple of the 5 July 2013 morning eruption of Grand Geyser.
28 Jun 2013 @ 0834 JSJ https://www.youtube.com/watch?v=MZjEKbivLug Video by Micah Kipple of the 28 June 2013 morning eruption of Grand Geyser.
06 Aug 2013 @ 1307 Micah Kipple https://www.flickr.com/photos/128128779@N05/15606907148 flickr
27 Jul 2014 @ 1538 Micah Kipple https://www.flickr.com/photos/joshy55013/15630773769 flickr
24 Sep 2014 @ 1256 Micah Kipple https://www.flickr.com/photos/126760153@N03/15828712802 flickr
20 Sep 2014 @ 1611 Micah Kipple https://www.flickr.com/photos/129696754@N08/15877864399 flickr
10 Jun 2014 @ 1327 Micah Kipple https://www.flickr.com/photos/107465174@N04/15887463047 flickr
BaselineDistance (ft)Description
South Side 200Jugwalk south of Grand at the Y junction at Belgian Pool


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